New BFgoodrich D/R's, have questions???

[tHeOnEGT]

Just bought new G-force T/A drag radial 275/40-17's. They hook a lot better then my old goodyears on the street,wow!!
Ready to go to track this weekend, would like to know what tire pressure to lower them down to, and how long to heat them up?? Quick clean off, burnout for couple seconds??? Suggestions please


thanks
eric

 

[RYC CUKR]

I run my MT drag radials at about 18 psi at the track and I usually back them into the water but don't spin them and then do a couple of second burn out at least until I get some smoke then race.

 

[stang8urimport]

Drag radials, per all manufacturer's, need to be HOT, REAL hot, to get to hook well. DR's should be heated up for atleast 5-10 seconds... Let them smoke! I did about a 7 second burn out with line lock in 2nd gear in my 83 vert, ran 13 psi, and ran constant 1.6 60 foot.

 

[onefstsnake]

wonder if I can spin mine in 2nd...

Would I just start in 2nd gear?


Cuz on the street they wont spin unless I drop the clutch at like 3-4k

 

[maverick0716]

I wouldn't recommend a dry 2nd gear burnout......roll the tires through the water first, then let 'er rip.

 

[onefstsnake]

yeah Ive never run at a track so not too sure.

The 1/8th that Ill be at tomorrow is really narrow. So I hope she launches straight.

 

[maverick0716]

If she goes a little squirrly, just don't be afraid to back off....it's no big deal.

 

[onefstsnake]

Yeah My trakloc is a little iffy.

If I just mash the gas I get a 1 wheel peel, but If I stand on the brake both spin...

Im thinking ill set the air pressure to ~20-22psi

 

[Flavadave4]

Yeah My trakloc is a little iffy.

If I just mash the gas I get a 1 wheel peel, but If I stand on the brake both spin...

Im thinking ill set the air pressure to ~20-22psi

I am interested to see what you run.....we have simular mods...but you are lighter than me.

Dont get discouraged if you run 10's in the 1/8.......getting your car to hook up at the track is totaly differnt than on the street.
Good luck dude

 

[tHeOnEGT]

thanks for all the tips! How many miles people getting on these tires, they seem like they will only last like a 1000 miles? oh well

 

[mackey]

When you do do a 2nd gear burnout do you drop the clutch? My car just bogs. I Do have 3.73 gears and trap around 105. I know I should be trapping higher. Am I holding on the brakes too hard?

 

[onefstsnake]

made 3 runs tonight.

Car ran well.

1st run: Short Burnout, Launch at 2500rpm
Times RT:1.1s/60':1.90/8th:9.12 @ 76mph

2nd run: Short Burnout, Launch at 3000rpm
Times RT: 1.04/60':2.01/8th:9.04 @ 77mph

First 2 runs it bogged really bad.

3rd run: Longer Smokey Burnout, Launch at 4000rpm.
BANG!!! Busted the drivers side axle...

 

[slow93]

ouch!!

 

[onefstsnake]

buddy of mine is selling me an Auburn locker for $200 only 1000 miles on it and maybe a dozen passes.

Going for Moser 31 spline axles and Ill try to reuse the 3.73s that I have already.

 

[slow93]

that should work a little better..i have been lucky so far and havent snapped any axles and i pull consistant 1.7 60' times